1 package C4::Auth_with_ldap;
3 # Copyright 2000-2002 Katipo Communications
5 # This file is part of Koha.
7 # Koha is free software; you can redistribute it and/or modify it
8 # under the terms of the GNU General Public License as published by
9 # the Free Software Foundation; either version 3 of the License, or
10 # (at your option) any later version.
12 # Koha is distributed in the hope that it will be useful, but
13 # WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with Koha; if not, see <http://www.gnu.org/licenses>.
24 use C4::Members::Messaging;
25 use C4::Auth qw( checkpw_internal );
26 use C4::Letters qw( GetPreparedLetter EnqueueLetter SendQueuedMessages );
28 use Koha::AuthUtils qw( hash_password );
30 use Net::LDAP::Filter;
32 our (@ISA, @EXPORT_OK);
36 @EXPORT_OK = qw( checkpw_ldap );
39 # Redefine checkpw_ldap:
40 # connect to LDAP (named or anonymous)
41 # ~ retrieves $userid from KOHA_CONF mapping
42 # ~ then compares $password with userPassword
43 # ~ then gets the LDAP entry
44 # ~ and calls the memberadd if necessary
46 sub ldapserver_error {
47 return sprintf('No ldapserver "%s" defined in KOHA_CONF: ' . $ENV{KOHA_CONF}, shift);
50 use vars qw($mapping @ldaphosts $base $ldapname $ldappassword);
51 my $ldap = C4::Context->config("ldapserver") or die 'No "ldapserver" in server hash from KOHA_CONF: ' . $ENV{KOHA_CONF};
52 # since Bug 28278 we need to skip id in <ldapserver id="ldapserver"> which generates additional hash level
53 if ( exists $ldap->{ldapserver} ) {
54 $ldap = $ldap->{ldapserver} or die ldapserver_error('id="ldapserver"');
56 my $prefhost = $ldap->{hostname} or die ldapserver_error('hostname');
57 my $base = $ldap->{base} or die ldapserver_error('base');
58 $ldapname = $ldap->{user} ;
59 $ldappassword = $ldap->{pass} ;
60 our %mapping = %{$ldap->{mapping}}; # FIXME dpavlin -- don't die because of || (); from 6eaf8511c70eb82d797c941ef528f4310a15e9f9
61 my @mapkeys = keys %mapping;
62 #warn "Got ", scalar(@mapkeys), " ldap mapkeys ( total ): ", join ' ', @mapkeys, "\n";
63 @mapkeys = grep {defined $mapping{$_}->{is}} @mapkeys;
64 #warn "Got ", scalar(@mapkeys), " ldap mapkeys (populated): ", join ' ', @mapkeys, "\n";
66 my %categorycode_conversions;
67 my $default_categorycode;
68 if(defined $ldap->{categorycode_mapping}) {
69 $default_categorycode = $ldap->{categorycode_mapping}->{default};
70 foreach my $cat (@{$ldap->{categorycode_mapping}->{categorycode}}) {
71 $categorycode_conversions{$cat->{value}} = $cat->{content};
76 anonymous => defined ($ldap->{anonymous_bind}) ? $ldap->{anonymous_bind} : 1,
77 replicate => defined($ldap->{replicate}) ? $ldap->{replicate} : 1, # add from LDAP to Koha database for new user
78 welcome => defined($ldap->{welcome}) ? $ldap->{welcome} : 0, # send welcome notice when patron is added via replicate
79 update => defined($ldap->{update}) ? $ldap->{update} : 1, # update from LDAP to Koha database for existing user
83 my $result = shift or return;
84 return "LDAP error #" . $result->code
85 . ": " . $result->error_name . "\n"
86 . "# " . $result->error_text . "\n";
90 my $db = shift or return;
91 my $userid = shift or return;
92 my $uid_field = $mapping{userid}->{is} or die ldapserver_error("mapping for 'userid'");
93 my $filter = Net::LDAP::Filter->new("$uid_field=$userid") or die "Failed to create new Net::LDAP::Filter";
94 my $search = $db->search(
99 die "LDAP search failed to return object : " . $search->error if $search->code;
101 my $count = $search->count;
102 if ($search->code > 0) {
103 warn sprintf("LDAP Auth rejected : %s gets %d hits\n", $filter->as_string, $count) . description($search);
107 warn sprintf("LDAP Auth rejected : search with filter '%s' returns no hit\n", $filter->as_string);
114 my ($userid, $password) = @_;
115 my @hosts = split(',', $prefhost);
116 my $db = Net::LDAP->new(\@hosts);
118 warn "LDAP connexion failed";
124 # first, LDAP authentication
125 if ( $ldap->{auth_by_bind} ) {
127 if ( $config{anonymous} ) {
129 # Perform an anonymous bind
132 warn "Anonymous LDAP bind failed: " . description($res);
136 # Perform a LDAP search for the given username
137 my $search = search_method( $db, $userid )
138 or return 0; # warnings are in the sub
139 $userldapentry = $search->shift_entry;
140 $principal_name = $userldapentry->dn;
143 $principal_name = $ldap->{principal_name};
144 if ( $principal_name and $principal_name =~ /\%/ ) {
145 $principal_name = sprintf( $principal_name, $userid );
148 $principal_name = $userid;
152 # Perform a LDAP bind for the given username using the matched DN
153 my $res = $db->bind( $principal_name, password => $password );
155 if ( $config{anonymous} ) {
156 # With anonymous_bind approach we can be sure we have found the correct user
157 # and that any 'code' response indicates a 'bad' user (be that blocked, banned
158 # or password changed). We should not fall back to local accounts in this case.
159 warn "LDAP bind failed as kohauser $userid: " . description($res);
162 # Without a anonymous_bind, we cannot be sure we are looking at a valid ldap user
163 # at all, and thus we should fall back to local logins to restore previous behaviour
165 warn "LDAP bind failed as kohauser $userid: " . description($res);
169 if ( !defined($userldapentry)
170 && ( $config{update} or $config{replicate} ) )
172 my $search = search_method( $db, $userid ) or return 0;
173 $userldapentry = $search->shift_entry;
176 my $res = ($config{anonymous}) ? $db->bind : $db->bind($ldapname, password=>$ldappassword);
177 if ($res->code) { # connection refused
178 warn "LDAP bind failed as ldapuser " . ($ldapname || '[ANONYMOUS]') . ": " . description($res);
181 my $search = search_method($db, $userid) or return 0; # warnings are in the sub
182 # Handle multiple branches. Same login exists several times in different branches.
184 while (my $entry = $search->shift_entry) {
185 my $user_ldap_bind_ret = $db->bind($entry->dn, password => $password);
186 unless ($user_ldap_bind_ret->code) {
187 $userldapentry = $entry;
194 warn "LDAP Auth rejected : invalid password for user '$userid'.";
201 # To get here, LDAP has accepted our user's login attempt.
202 # But we still have work to do. See perldoc below for detailed breakdown.
205 my ($borrowernumber,$cardnumber,$local_userid,$savedpw) = exists_local($userid);
208 if (( $borrowernumber and $config{update} ) or
209 (!$borrowernumber and $config{replicate}) ) {
210 %borrower = ldap_entry_2_hash($userldapentry,$cardnumber);
211 #warn "checkpw_ldap received \%borrower w/ " . keys(%borrower), " keys: ", join(' ', keys %borrower), "\n";
214 if ($borrowernumber) {
215 if ( $config{update} ) { # A1, B1
216 my $c2 = &update_local( $local_userid, $password, $borrowernumber, \%borrower ) || '';
217 ( $cardnumber eq $c2 ) or warn "update_local returned cardnumber '$c2' instead of '$cardnumber'";
219 # maybe update just the password?
220 my $patron = Koha::Patrons->find($borrowernumber);
221 return ( 1, $cardnumber, $local_userid, $patron );
223 } elsif ($config{replicate}) { # A2, C2
224 my @columns = Koha::Patrons->columns;
225 $patron = Koha::Patron->new(
227 map { exists( $borrower{$_} ) ? ( $_ => $borrower{$_} ) : () } @columns
230 die "Insert of new patron failed" unless $patron;
231 $borrowernumber = $patron->borrowernumber;
232 C4::Members::Messaging::SetMessagingPreferencesFromDefaults(
234 borrowernumber => $borrowernumber,
235 categorycode => $borrower{'categorycode'}
239 # Send welcome email if enabled
240 if ( $config{welcome} ) {
241 my $emailaddr = $patron->notice_email_address;
243 # if we manage to find a valid email address, send notice
245 my $letter = C4::Letters::GetPreparedLetter(
247 letter_code => 'WELCOME',
248 branchcode => $patron->branchcode,
249 lang => $patron->lang || 'default',
251 'branches' => $patron->branchcode,
252 'borrowers' => $patron->borrowernumber,
257 my $message_id = C4::Letters::EnqueueLetter(
260 borrowernumber => $patron->id,
261 to_address => $emailaddr,
262 message_transport_type => 'email'
266 C4::Letters::SendQueuedMessages( { message_id => $message_id } ) if $message_id;
272 if (C4::Context->preference('ExtendedPatronAttributes') && $borrowernumber && ($config{update} ||$config{replicate})) {
273 my $library_id = C4::Context->userenv ? C4::Context->userenv->{'branch'} : undef;
274 my $attribute_types = Koha::Patron::Attribute::Types->search_with_library_limits({}, {}, $library_id);
275 while ( my $attribute_type = $attribute_types->next ) {
276 my $code = $attribute_type->code;
277 unless (exists($borrower{$code}) && $borrower{$code} !~ m/^\s*$/ ) {
280 $patron = Koha::Patrons->find($borrowernumber);
281 if ( $patron ) { # Should not be needed, but we are in C4::Auth LDAP...
283 my $attribute = Koha::Patron::Attribute->new({code => $code, attribute => $borrower{$code}});
284 $patron->extended_attributes([$attribute->unblessed]);
286 if ($@) { # FIXME Test if Koha::Exceptions::Patron::Attribute::NonRepeatable
287 warn "ERROR_extended_unique_id_failed $code $borrower{$code}";
292 return(1, $cardnumber, $userid, $patron);
295 # Pass LDAP entry object and local cardnumber (userid).
296 # Returns borrower hash.
297 # Edit KOHA_CONF so $memberhash{'xxx'} fits your ldap structure.
298 # Ensure that mandatory fields are correctly filled!
300 sub ldap_entry_2_hash {
301 my $userldapentry = shift;
302 my %borrower = ( cardnumber => shift );
304 $userldapentry->exists('uid'); # This is bad, but required! By side-effect, this initializes the attrs hash.
305 #foreach (keys %$userldapentry) {
306 # print STDERR "\n\nLDAP key: $_\t", sprintf('(%s)', ref $userldapentry->{$_}), "\n";
308 my $x = $userldapentry->{attrs} or return;
310 $memberhash{$_} = join ' ', @{$x->{$_}};
311 #warn sprintf("building \$memberhash{%s} = ", $_, join(' ', @{$x->{$_}})), "\n";
313 #warn "Finished \%memberhash has ", scalar(keys %memberhash), " keys\n", "Referencing \%mapping with ", scalar(keys %mapping), " keys\n";
314 foreach my $key (keys %mapping) {
315 my $data = $memberhash{ lc($mapping{$key}->{is}) }; # Net::LDAP returns all names in lowercase
316 #warn "mapping %20s ==> %-20s (%s)\n", $key, $mapping{$key}->{is}, $data;
317 unless (defined $data) {
318 $data = $mapping{$key}->{content} || undef;
320 $borrower{$key} = $data;
322 $borrower{initials} = $memberhash{initials} ||
323 ( substr($borrower{'firstname'},0,1)
324 . substr($borrower{ 'surname' },0,1)
327 # categorycode conversions
328 if(defined $categorycode_conversions{$borrower{categorycode}}) {
329 $borrower{categorycode} = $categorycode_conversions{$borrower{categorycode}};
331 elsif($default_categorycode) {
332 $borrower{categorycode} = $default_categorycode;
335 # check if categorycode exists, if not, fallback to default from koha-conf.xml
336 my $dbh = C4::Context->dbh;
337 my $sth = $dbh->prepare("SELECT categorycode FROM categories WHERE categorycode = ?");
338 $sth->execute( uc($borrower{'categorycode'}) );
339 unless ( my $row = $sth->fetchrow_hashref ) {
340 my $default = $mapping{'categorycode'}->{content};
341 #warn "Can't find ", $borrower{'categorycode'}, " default to: $default for ", $borrower{userid};
342 $borrower{'categorycode'} = $default
350 my $dbh = C4::Context->dbh;
351 my $select = "SELECT borrowernumber,cardnumber,userid,password FROM borrowers ";
353 my $sth = $dbh->prepare("$select WHERE userid=?"); # was cardnumber=?
355 #warn "Userid '$arg' exists_local? %s\n", $sth->rows;
356 ($sth->rows == 1) and return $sth->fetchrow;
358 $sth = $dbh->prepare("$select WHERE cardnumber=?");
360 #warn "Cardnumber '$arg' exists_local? %s\n", $sth->rows;
361 ($sth->rows == 1) and return $sth->fetchrow;
365 # This function performs a password update, given the userid, borrowerid,
366 # and digested password. It will verify that things are correct and return the
367 # borrowers cardnumber. The idea is that it is used to keep the local
368 # passwords in sync with the LDAP passwords.
370 # $cardnum = _do_changepassword($userid, $borrowerid, $digest)
372 # Note: if the LDAP config has the update_password tag set to a false value,
373 # then this will not update the password, it will simply return the cardnumber.
374 sub _do_changepassword {
375 my ($userid, $borrowerid, $password) = @_;
377 if ( exists( $ldap->{update_password} ) && !$ldap->{update_password} ) {
379 # We don't store the password in the database
380 my $sth = C4::Context->dbh->prepare(
381 'SELECT cardnumber FROM borrowers WHERE borrowernumber=?');
382 $sth->execute($borrowerid);
383 die "Unable to access borrowernumber "
384 . "with userid=$userid, "
385 . "borrowernumber=$borrowerid"
387 my ($cardnum) = $sth->fetchrow;
388 $sth = C4::Context->dbh->prepare(
389 'UPDATE borrowers SET password = null WHERE borrowernumber=?');
390 $sth->execute($borrowerid);
394 my $digest = hash_password($password);
395 #warn "changing local password for borrowernumber=$borrowerid to '$digest'\n";
396 Koha::Patrons->find($borrowerid)->set_password({ password => $password, skip_validation => 1 });
398 my ($ok, $cardnum) = checkpw_internal($userid, $password);
399 return $cardnum if $ok;
401 warn "Password mismatch after update to borrowernumber=$borrowerid";
406 my $userid = shift or croak "No userid";
407 my $password = shift or croak "No password";
408 my $borrowerid = shift or croak "No borrowerid";
409 my $borrower = shift or croak "No borrower record";
411 # skip extended patron attributes in 'borrowers' attribute update
412 my @keys = keys %$borrower;
413 if (C4::Context->preference('ExtendedPatronAttributes')) {
414 my $library_id = C4::Context->userenv ? C4::Context->userenv->{'branch'} : undef;
415 my $attribute_types = Koha::Patron::Attribute::Types->search_with_library_limits({}, {}, $library_id);
416 while ( my $attribute_type = $attribute_types->next ) {
417 my $code = $attribute_type->code;
418 @keys = grep { $_ ne $code } @keys;
419 #warn "ignoring extended patron attribute '%s' in update_local()\n", $code;
423 my $dbh = C4::Context->dbh;
424 my $query = "UPDATE borrowers\nSET " .
425 join(',', map {"$_=?"} @keys) .
426 "\nWHERE borrowernumber=? ";
427 my $sth = $dbh->prepare($query);
428 #warn $query, "\n", join "\n", map {"$_ = '" . $borrower->{$_} . "'"} @keys;
429 #warn "\nuserid = $userid\n";
431 ((map {$borrower->{$_}} @keys), $borrowerid)
434 # MODIFY PASSWORD/LOGIN if password was mapped
435 _do_changepassword($userid, $borrowerid, $password) if exists( $borrower->{'password'} );
443 C4::Auth - Authenticates Koha users
447 use C4::Auth_with_ldap;
449 =head1 LDAP Configuration
451 This module is specific to LDAP authentification. It requires Net::LDAP package and one or more
452 working LDAP servers.
454 * Modify ldapserver element in KOHA_CONF
455 * Establish field mapping in <mapping> element.
457 For example, if your user records are stored according to the inetOrgPerson schema, RFC#2798,
458 the username would match the "uid" field, and the password should match the "userpassword" field.
460 Make sure that ALL required fields are populated by your LDAP database (and mapped in KOHA_CONF).
461 What are the required fields? Well, in mysql you can check the database table "borrowers" like this:
463 mysql> show COLUMNS from borrowers;
464 +---------------------+--------------+------+-----+---------+----------------+
465 | Field | Type | Null | Key | Default | Extra |
466 +---------------------+--------------+------+-----+---------+----------------+
467 | borrowernumber | int(11) | NO | PRI | NULL | auto_increment |
468 | cardnumber | varchar(16) | YES | UNI | NULL | |
469 | surname | mediumtext | NO | | NULL | |
470 | firstname | text | YES | | NULL | |
471 | title | mediumtext | YES | | NULL | |
472 | othernames | mediumtext | YES | | NULL | |
473 | initials | text | YES | | NULL | |
474 | streetnumber | varchar(10) | YES | | NULL | |
475 | streettype | varchar(50) | YES | | NULL | |
476 | address | mediumtext | NO | | NULL | |
477 | address2 | text | YES | | NULL | |
478 | city | mediumtext | NO | | NULL | |
479 | state | mediumtext | YES | | NULL | |
480 | zipcode | varchar(25) | YES | | NULL | |
481 | country | text | YES | | NULL | |
482 | email | mediumtext | YES | | NULL | |
483 | phone | text | YES | | NULL | |
484 | mobile | varchar(50) | YES | | NULL | |
485 | fax | mediumtext | YES | | NULL | |
486 | emailpro | text | YES | | NULL | |
487 | phonepro | text | YES | | NULL | |
488 | B_streetnumber | varchar(10) | YES | | NULL | |
489 | B_streettype | varchar(50) | YES | | NULL | |
490 | B_address | varchar(100) | YES | | NULL | |
491 | B_address2 | text | YES | | NULL | |
492 | B_city | mediumtext | YES | | NULL | |
493 | B_state | mediumtext | YES | | NULL | |
494 | B_zipcode | varchar(25) | YES | | NULL | |
495 | B_country | text | YES | | NULL | |
496 | B_email | text | YES | | NULL | |
497 | B_phone | mediumtext | YES | | NULL | |
498 | dateofbirth | date | YES | | NULL | |
499 | branchcode | varchar(10) | NO | MUL | | |
500 | categorycode | varchar(10) | NO | MUL | | |
501 | dateenrolled | date | YES | | NULL | |
502 | dateexpiry | date | YES | | NULL | |
503 | gonenoaddress | tinyint(1) | YES | | NULL | |
504 | lost | tinyint(1) | YES | | NULL | |
505 | debarred | date | YES | | NULL | |
506 | debarredcomment | varchar(255) | YES | | NULL | |
507 | contactname | mediumtext | YES | | NULL | |
508 | contactfirstname | text | YES | | NULL | |
509 | contacttitle | text | YES | | NULL | |
510 | borrowernotes | mediumtext | YES | | NULL | |
511 | relationship | varchar(100) | YES | | NULL | |
512 | ethnicity | varchar(50) | YES | | NULL | |
513 | ethnotes | varchar(255) | YES | | NULL | |
514 | sex | varchar(1) | YES | | NULL | |
515 | password | varchar(30) | YES | | NULL | |
516 | flags | int(11) | YES | | NULL | |
517 | userid | varchar(30) | YES | MUL | NULL | |
518 | opacnote | mediumtext | YES | | NULL | |
519 | contactnote | varchar(255) | YES | | NULL | |
520 | sort1 | varchar(80) | YES | | NULL | |
521 | sort2 | varchar(80) | YES | | NULL | |
522 | altcontactfirstname | varchar(255) | YES | | NULL | |
523 | altcontactsurname | varchar(255) | YES | | NULL | |
524 | altcontactaddress1 | varchar(255) | YES | | NULL | |
525 | altcontactaddress2 | varchar(255) | YES | | NULL | |
526 | altcontactaddress3 | varchar(255) | YES | | NULL | |
527 | altcontactstate | mediumtext | YES | | NULL | |
528 | altcontactzipcode | varchar(50) | YES | | NULL | |
529 | altcontactcountry | text | YES | | NULL | |
530 | altcontactphone | varchar(50) | YES | | NULL | |
531 | smsalertnumber | varchar(50) | YES | | NULL | |
532 | privacy | int(11) | NO | | 1 | |
533 +---------------------+--------------+------+-----+---------+----------------+
534 66 rows in set (0.00 sec)
535 Where Null="NO", the field is required.
537 =head1 KOHA_CONF and field mapping
539 Example XML stanza for LDAP configuration in KOHA_CONF.
543 <useldapserver>1</useldapserver>
544 <!-- LDAP SERVER (optional) -->
545 <ldapserver id="ldapserver">
546 <hostname>localhost</hostname>
547 <base>dc=metavore,dc=com</base>
548 <user>cn=Manager,dc=metavore,dc=com</user> <!-- DN, if not anonymous -->
549 <pass>metavore</pass> <!-- password, if not anonymous -->
550 <replicate>1</replicate> <!-- add new users from LDAP to Koha database -->
551 <welcome>1</welcome> <!-- send new users the welcome email when added via replicate -->
552 <update>1</update> <!-- update existing users in Koha database -->
553 <auth_by_bind>0</auth_by_bind> <!-- set to 1 to authenticate by binding instead of
554 password comparison, e.g., to use Active Directory -->
555 <anonymous_bind>0</anonymous_bind> <!-- set to 1 if users should be searched using
556 an anonymous bind, even when auth_by_bind is on -->
557 <principal_name>%s@my_domain.com</principal_name>
558 <!-- optional, for auth_by_bind: a printf format to make userPrincipalName from koha userid.
559 Not used with anonymous_bind. -->
560 <update_password>1</update_password> <!-- set to 0 if you don't want LDAP passwords
561 synced to the local database -->
562 <mapping> <!-- match koha SQL field names to your LDAP record field names -->
563 <firstname is="givenname" ></firstname>
564 <surname is="sn" ></surname>
565 <address is="postaladdress" ></address>
566 <city is="l" >Athens, OH</city>
567 <zipcode is="postalcode" ></zipcode>
568 <branchcode is="branch" >MAIN</branchcode>
569 <userid is="uid" ></userid>
570 <password is="userpassword" ></password>
571 <email is="mail" ></email>
572 <categorycode is="employeetype" >PT</categorycode>
573 <phone is="telephonenumber"></phone>
578 The <mapping> subelements establish the relationship between mysql fields and LDAP attributes. The element name
579 is the column in mysql, with the "is" characteristic set to the LDAP attribute name. Optionally, any content
580 between the element tags is taken as the default value. In this example, the default categorycode is "PT" (for
585 Once a user has been accepted by the LDAP server, there are several possibilities for how Koha will behave, depending on
586 your configuration and the presence of a matching Koha user in your local DB:
589 OPTION UPDATE REPLICATE EXISTS? RESULT
590 A1 1 1 1 OK : We're updating them anyway.
591 A2 1 1 0 OK : We're adding them anyway.
592 B1 1 0 1 OK : We update them.
593 B2 1 0 0 FAIL: We cannot add new user.
594 C1 0 1 1 OK : We do nothing. (maybe should update password?)
595 C2 0 1 0 OK : We add the new user.
596 D1 0 0 1 OK : We do nothing. (maybe should update password?)
597 D2 0 0 0 FAIL: We cannot add new user.
599 Note: failure here just means that Koha will fallback to checking the local DB. That is, a given user could login with
600 their LDAP password OR their local one. If this is a problem, then you should enable update and supply a mapping for
601 password. Then the local value will be updated at successful LDAP login and the passwords will be synced.
603 If you choose NOT to update local users, the borrowers table will not be affected at all.
604 Note that this means that patron passwords may appear to change if LDAP is ever disabled, because
605 the local table never contained the LDAP values.
609 Binds as the user instead of retrieving their record. Recommended if update disabled.
611 =head2 principal_name
613 Provides an optional sprintf-style format for manipulating the userid before the bind.
614 Even though the userPrincipalName is one intended target, any uniquely identifying
615 attribute that the server allows to be used for binding could be used.
617 Currently, principal_name only operates when auth_by_bind is enabled.
619 =head2 update_password
621 If this tag is left out or set to a true value, then the user's LDAP password
622 will be stored (hashed) in the local Koha database. If you don't want this
623 to happen, then set the value of this to '0'. Note that if passwords are not
624 stored locally, and the connection to the LDAP system fails, then the users
625 will not be able to log in at all.
627 =head2 Active Directory
629 The auth_by_bind and principal_name settings are recommended for Active Directory.
631 Under default Active Directory rules, we cannot determine the distinguishedName attribute from the Koha userid as reliably as
632 we would typically under openldap. Instead of:
634 distinguishedName: CN=barnes.7,DC=my_company,DC=com
638 distinguishedName: CN=Barnes\, Jim,OU=Test Accounts,OU=User Accounts,DC=my_company,DC=com
640 Matching that would require us to know more info about the account (firstname, surname) and to include punctuation and whitespace
641 in Koha userids. But the userPrincipalName should be consistent, something like:
643 userPrincipalName: barnes.7@my_company.com
645 Therefore it is often easier to bind to Active Directory with userPrincipalName, effectively the
646 canonical email address for that user, or what it would be if email were enabled for them. If Koha userid values
647 will match the username portion of the userPrincipalName, and the domain suffix is the same for all users, then use principal_name
649 <principal_name>%s@core.my_company.com</principal_name>
651 The user of the previous example, barnes.7, would then attempt to bind as:
652 barnes.7@core.my_company.com
668 # For reference, here's an important difference in the data structure we rely on.
669 # ========================================
670 # Using attrs instead of {asn}->attributes
671 # ========================================
673 # LDAP key: ->{ cn} = ARRAY w/ 3 members.
674 # LDAP key: ->{ cn}->{ sss} = sss
675 # LDAP key: ->{ cn}->{ Steve Smith} = Steve Smith
676 # LDAP key: ->{ cn}->{Steve S. Smith} = Steve S. Smith
678 # LDAP key: ->{ givenname} = ARRAY w/ 1 members.
679 # LDAP key: ->{ givenname}->{Steve} = Steve